<template>
    <div>
        <input type=button value="+1" @click="addNum"/>
        {{num}}
        <input type=button value="-1" @click="subNum"/>
    </div>
</template>
<script>
export default {
    data(){
        return{ num:0};
    },
    methods:{
        addNum(){
            this.num++;
        },
        subNum(){
            this.num--;
        },
    },
};
</script>
<style>
    
</style>